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Date: Fri,  9 Sep 2016 13:41:08 -0400 (EDT)
From: cve-assign@...re.org
To: ago@...too.org
Cc: cve-assign@...re.org, oss-security@...ts.openwall.com
Subject: Re: ettercap: etterlog: multiple crashes

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> Basically, the tool should read what you capture with YOUR ettercap, but since
> ettercap is one of the valid tools for MITM, there are dozens of blog post
> about how to use it, so there could be posts where malicious users make
> available crafted datafile to show something.
> 
> Details:
> https://blogs.gentoo.org/ago/2016/09/06/ettercap-etterlog-multiple-three-heap-based-buffer-overflow-el_profiles-c/
> 
> https://blogs.gentoo.org/ago/2016/09/09/ettercap-etterlog-null-pointer-dereference-in-fingerprint_search-ec_fingerprint-c/

These are crashes of a command-line program, not a program that is
supposed to continue running to handle a series of inputs. No write
access is reported. Also, running etterlog on an arbitrary
attacker-modified .ecp or .eci file probably would occur very rarely.

The "(three) heap-based buffer overflow" report is exclusively about
"AddressSanitizer: heap-buffer-overflow ... READ." It's apparently
about an attacker who fuzzes a file so that an IP address-length field
is a large number rather than, for example, 4 or 32. A memcmp reads
out-of-bounds data but the flow of control isn't altered. Also, this
happens in the etterlog source code (utils/etterlog/el_profiles.c),
not in library code that might be used in other applications.

We feel that these crashes are just an inconvenience, not a security
risk, and there are no CVE IDs at this time.

- -- 
CVE Assignment Team
M/S M300, 202 Burlington Road, Bedford, MA 01730 USA
[ A PGP key is available for encrypted communications at
  http://cve.mitre.org/cve/request_id.html ]
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